Hinge-mortising machine



( No Model.) J. A MACKENZIE 2 Sheets-Sheet 1.

HINGE MORIISING MACHINE.

Patented Sept. 30, 1890.

llllllllllll (No Medal.) J. A MAC ENZIE. Sheets-Sheet 2.

HINGHMORTISING MAOHINE. 7 N0. 43-7 ,657.- Patented Sept. 30, 1890.

UNITED STATES PATENT OFFICE.

JAMES A. MACKENZIE, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO JOHN J.OOMSTOCK, ALBERT W. STORMS, AND JOHN H. WILLARD, OF CHICAGO,

ILLINOIS.

HINGE-MORTISING MACHINE.

SPECIFICATION forming part of Letters Patent No. 437,657, datedSeptember 30, 1890.

Application filed February 1, 1890. Serial No. 338,926. (No model.) i

To all whom, it may concern.-

Be it known that I, JAMES A. IVIACKENZIE, of Minneapolis, Minnesota,have invented certain new and useful Improvements in Hinge- MortisingMachines, of which the following is a specification.

My present invention is an improvement upon themortising-machinedescribed in Patent No. 355,272, issued to me December28, 1886 and the principal improvement consists in certain features ofconstruction whereby the device is adapted to cut gains or mortises ofdifferent lengths. In my present construction I provide a knife-stockhaving one or both of its end walls movable laterally, and then byintroducing front and sliding knives of difierent widths it is perfectlyadapted to cut gains or mortises of dilferent lengths.

A further improvement consists in adapting the pivoted lever, which isused to actuate the sliding knife, to be moved aside to permit thesliding knife to be taken out and aknife of different width substituted.This I do by pivoting the handle upon a rod of such length that saidhandle may be moved laterally to take its lower end out of engagementwith the rack on top of the sliding knife, and thereby free the latterso that it can be removed. I

, preferably hold the handle normally in ento be moved out of engagementwhen desired.

In my said former patent I described as a means for cutting the gaindeeper at its outer edge than at its inner a sliding knife held in aninclined position. In my present construction I secure the same resultby a diiferent arrangement, viz: I provide the depth-gage withbearing-feet, which are inclined upwardly on their bearing-surfaces fromthe outer toward the inner ends, and thereby the knives are tilted withtheir cutting-edges at an angle to the horizontal, so that the chipremoved is thicker on one edge than the other, and the mortise producedby the machine is deeper on its outer than itsinner edge. I also providea depth-gage of improved construction.

In the accompanying drawings, Figure 1 is a side elevation of thedevice; Fig. 2 a rear elevation; :Fig. 3 a bottom plan view. Fig. 4 is afront elevation. Fig. 5 is a side elevation, partly in section. Fig. 6is adetail view of one of the adjustable walls of the knifestock, andFig. 7 is a cross-section through a block in which a gain or mortise hasbeen cut.

as hereinafter described. At the front of the frame thereis avertically-projecting member 12, which forms a stock for the front knife13, whiclrmakes a longitudinal cut in forming the gains or mortises.holding the transverse cutting-knives, and it consists of a head havinga slot to receive the knife and a right angular extension 15. This blockor stock 14 will move with its flat side against a flat portion of theframe beneath the handle and its fellow will be corre spondinglyformed.The angular portions 15 will lap by each other and be secured by a wedgeshaped screw 16, which passes between them and impinging on theirbeveled edges forces them outwardly-one against the rear wall of theframe and the other against the front knifethereby not only securingthem in place, but also securing the front knife in position. Byloosening this screw the side knives may be adjusted to and from eachother and a front knife of suitable length introduced to form any lengthof gain or mortise desired.

17 is a sliding knife moving freely in the ways 11, and which isactuated bya lever 18, turning freely on a fixed rod 19, secured on ears20, projecting from the frame. The lower end of the lever engages therack-teeth 17 on the top of the knife, and by operating the lever theknife may be moved in to cut out the chip. To permit of the removal andinsertion of the sliding knife, the rod 19 is of such length that thelever may be moved laterally thereon to take its lower end out of en-14. is a stock for gagement with the rack-teeth, and to do this I preferto confine the knife in its operative position by means of the coiledspring 22, having one end confined against the lug and the other bearingagainst the lever, as shown in Fig. 4.

' 23 is a depth-gage, held to the frame by means of the set-screws 24,which pass through elongated openings 25 in the gage and are tapped intothe frame. The frame is recessed to receive the depth-gage, and therecess is provided with inclined sides, the cross-bar of,

thedepth-gagebeing correspondingly inclined and fitted into said recess.By loosening the screws and moving said bar the one way or the otheralong the inclined recess it is evident that the depth of the out may beregulated.

The bearing-feet have their lower ends inclined upwardly from front torear, and it is evident that when they come to rest upon a plane surfacethe knives will be in angular position with reference to said surface.From this it results that the outer side of the gain will be cut deeperthan the inner side. If it v be desired to out a gain of uniform depth,the

bearing-feet will be parallel to the sliding knife. I also provide awidth-gage 26 and the chip-expeller 27, which are similar' to thosedescribed in my previous patent,

1. In a device for forming hinge-mortises, the combination, with theframe having an operating-handle, of a stationary knife-stock for thefront knife, laterally-adj ustable stocks for the side knives, and asliding knife mounted in ways of the frame and adapted to be projectedbetween the side knives, substantially asdescribed.

2; In a device for forming hinge-mortises, the combination, with theframe having a stationary stock for holding the front knife, of one ormore movable stocks for holding the side knives, a removable slidingknife, and an operating-lever for moving said knife, sub stantially asdescribed.

3. In a hinge-mortiser, the combination,with the cutting-knives, of adepth-gage having bearing-feet inclined from front to rear and aninclined cross-bar fitted to an inclined way of the frame and securedthereto by screws passing through elongated apertures in the cross bar,whereby mortises of difierent depths may be out, substantially asdescribed.

4. In a hinge-mortiser, the combination, with the operating-knives, of adepth-gage having its bearing-feet inclined from front to rear, 4

whereby the device is adapted to cut a mortise thicker at its outer thanat its inner side, substantially as described.

5. In a hinge-mortiser, the combinatiomwith the front and side knivesand a sliding knife movable in ways of the frame, of an operating-leverfor. said sliding knife pivoted between its ends upon a fulcru m-rodandadapted to be moved laterally along said rod to take its lower endout of engagement with the sliding knife, substantially as described.

6. In ahinge-rnortiser, the combjnatiomwith the front and side knivesand asliding knife movable in ways in the frame, of an operating-leverfor said sliding knife pivoted between its ends upon a fulcrum-rod andadapted to be moved laterally along said rod to take its lower end outof engagement with the sliding knife, and a spring adapted to hold saidlever normally in engagement with the knife, substantially as described.

JAMES A. MACKENZIE. Witnesses:

JOHN H. WILLARD, J OHN J. OoMsTooK.

